Effects of a Flat Panel Monitor Arm on Comfort, Posture and Preference in an Architectural Practice

The effects of installing a flat panel monitor arm (FPMA) at an architecture firm were investigated. Twenty eight participants were equally divided into test and control groups. Three surveys were conducted: pre-installation and one-month and 3-month post-installation. The web-based survey assessed musculoskeletal discomfort for eleven upper body regions, demographics, workstation utilization and workstation satisfaction. On-site measurements of workstation dimensions were taken and posture was observed using the Rapid Upper Limb Assessments (RULA) method for each survey. Participants reported that the FPMA allowed them to optimally position their screen and a majority said it made it easier to share information with colleagues. Total upper extremity musculoskeletal discomfort and computer vision syndrome symptoms were significantly reduced for the test group. However, no significant differences were found for specific body regions or for RULA scores.

[1]  A Carkeet,et al.  Workstation variables and visual discomfort associated with VDTs. , 1990, Applied ergonomics.

[2]  Cheu Ra Good vision at work. , 1998 .

[3]  S J Dain,et al.  Symptoms in VDU Operators , 1988, American journal of optometry and physiological optics.

[4]  M Miyao,et al.  Ergonomic evaluation of working posture of VDT operation using personal computer with flat panel display. , 1997, Industrial health.

[5]  D. Watson,et al.  Cervical Headache: An Investigation of Natural Head Posture and Upper Cervical Flexor Muscle Performance , 1993, Cephalalgia : an international journal of headache.

[6]  T. Schlote,et al.  Marked reduction and distinct patterns of eye blinking in patients with moderately dry eyes during video display terminal use , 2004, Graefe's Archive for Clinical and Experimental Ophthalmology.

[7]  Kerem Shuval,et al.  Prevalence of upper extremity musculoskeletal symptoms and ergonomic risk factors at a Hi-Tech company in Israel , 2005 .

[8]  H Kylian,et al.  Preferred position of visual displays relative to the eyes: a field study of visual strain and individual differences. , 1998, Ergonomics.

[9]  Adrian Glasser,et al.  Age related changes in accommodative dynamics in humans , 2006, Vision Research.

[10]  Maxwell Fogleman,et al.  Factors associated with self-reported musculoskeletal discomfort in video display terminal (VDT) users , 2002 .

[11]  A. Barr,et al.  Pathophysiological tissue changes associated with repetitive movement: a review of the evidence. , 2002, Physical therapy.

[12]  C. Blehm,et al.  Computer vision syndrome: a review. , 2005, Survey of ophthalmology.

[13]  L. Punnett,et al.  Work-related musculoskeletal disorders: the epidemiologic evidence and the debate. , 2004, Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology.

[14]  Eduardo Fernández,et al.  Webvision: The Organization of the Retina and Visual System , 1995 .

[15]  Risto Näsänen,et al.  Display quality and the speed of visual letter search , 2001 .

[16]  Ruta Ustinaviciene,et al.  Association between occupational asthenopia and psycho-physiological indicators of visual strain in workers using video display terminals. , 2006, Medical science monitor : international medical journal of experimental and clinical research.

[17]  Aaron W. Bangor,et al.  Display Technology and Ambient Illumination Influences on Visual Fatigue at VDT Workstations , 2000 .

[18]  Harry L. Snyder,et al.  Effect of Image Polarity on VDT Task Performance , 1990 .

[19]  P. Kaufman,et al.  The mechanism of accommodation in primates. , 1999, Ophthalmology.

[20]  Martina Ziefle,et al.  Effects of Display Resolution on Visual Performance , 1998, Hum. Factors.

[21]  Marino Menozzi,et al.  CRT versus LCD: Effects of refresh rate, display technology and background luminance in visual performance. , 2001 .

[22]  Robin J. Burgess-Limerick,et al.  Visual Display Height , 2000, Hum. Factors.

[23]  W Jones,et al.  Computer users' postures and associations with workstation characteristics. , 2000, AIHAJ : a journal for the science of occupational and environmental health and safety.

[24]  S J Dain,et al.  Postural modifications of VDU operators wearing bifocal spectacles. , 1988, Applied ergonomics.

[25]  A Aarås,et al.  Postural load during VDU work: a comparison between various work postures. , 1997, Ergonomics.

[26]  C G Drury,et al.  Posture, discomfort and performance in a VDT task , 2000, Ergonomics.

[27]  Donald Bloswick,et al.  Comparison of ergonomic risk assessment outputs from Rapid Upper Limb Assessment and the Strain Index for tasks in automotive assembly plants. , 2003, Work.

[28]  Patricia Hyland Travers,et al.  Office Workers and Video Display Terminals , 2002, AAOHN journal : official journal of the American Association of Occupational Health Nurses.

[29]  David M DeJoy,et al.  Effects of an active ergonomics training program on risk exposure, worker beliefs, and symptoms in computer users. , 2005, Work.

[30]  P. Bongers,et al.  Duration of computer use and mouse use in relation to musculoskeletal disorders of neck or upper limb , 2002 .

[31]  Michael D. Snyder,et al.  HUMAN FACTORS DESIGN GUIDE (HFDG) FOR ACQUISITION OF COMMERCIAL OFF-THE-SHELF SUBSYSTEMS, NON-DEVELOPMENTAL ITEMS, AND DEVELOPMENTAL SYSTEMS , 1996 .

[32]  L. Straker,et al.  The impact of computer display height and desk design on muscle activity during information technology work by young adults. , 2008, Journal of Electromyography & Kinesiology.

[33]  Kate J. Garland,et al.  Paper-based versus computer-based assessment: is workload another test mode effect? , 2004, Br. J. Educ. Technol..

[34]  Gavriel Salvendy,et al.  Handbook of Human Factors and Ergonomics , 2005 .

[35]  F. Gerr,et al.  Epidemiology of musculoskeletal disorders among computer users: lesson learned from the role of posture and keyboard use. , 2004, Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology.

[36]  Fereydoun Aghazadeh,et al.  Effects of VDT monitor placement and single versus bifocal glasses on somatic discomfort and postural profiles in data entry tasks. , 2004, Journal of human ergology.

[37]  Kari Babski-Reeves,et al.  Assessment of video display workstation set up on risk factors associated with the development of low back and neck discomfort , 2005 .

[38]  B Nilsson,et al.  Musculoskeletal disorders among visual display terminal workers: individual, ergonomic, and work organizational factors. , 1995, Ergonomics.

[39]  M Hagberg,et al.  Concordance between VDU-users' ratings of comfort and perceived exertion with experts' observations of workplace layout and working postures. , 2005, Applied ergonomics.

[40]  J. Sheedy,et al.  The efficacy of computer glasses in reduction of computer worker symptoms. , 2002, Optometry.

[41]  Mark S. Sanders,et al.  Human Factors in Engineering and Design , 1957 .

[42]  M Urbanowicz,et al.  Alteration of vertical dimension and its effect on head and neck posture. , 1991, Cranio : the journal of craniomandibular practice.

[43]  R F Fisher,et al.  The force of contraction of the human ciliary muscle during accommodation , 1977, The Journal of physiology.

[44]  G. Jacobsen,et al.  The influence of near-work on development of myopia among university students. A three-year longitudinal study among engineering students in Norway. , 2000, Acta ophthalmologica Scandinavica.

[45]  W Jaschinski-Kruza,et al.  Visual strain during VDU work: the effect of viewing distance and dark focus. , 1988, Ergonomics.

[46]  A Hladký,et al.  Using a screen filter positively influences the physical well-being of VDU operators. , 1998, Central European journal of public health.

[47]  D. Mutti,et al.  Is computer use a risk factor for myopia? , 1996, Journal of the American Optometric Association.

[48]  L McAtamney,et al.  RULA: a survey method for the investigation of work-related upper limb disorders. , 1993, Applied ergonomics.

[49]  Alan Hedge,et al.  Predicting sick building syndrome at the individual and aggregate levels , 1996 .

[50]  John Rosecrance,et al.  Electromyographic Analysis of a Repetitive Hand Gripping Task. , 1998, International journal of occupational safety and ergonomics : JOSE.

[51]  A Hedge,et al.  Effects of lensed-indirect and parabolic lighting on the satisfaction, visual health, and productivity of office workers. , 1995, Ergonomics.

[52]  H Shahnavaz,et al.  Lighting conditions and workplace dimensions of VDU-operators. , 1982, Ergonomics.

[53]  K J Bowman,et al.  Task Variables and Visual Discomfort Associated with the Use of VDT's , 1991, Optometry and vision science : official publication of the American Academy of Optometry.

[54]  R. Dana,et al.  Impact of dry eye syndrome on vision-related quality of life. , 2007, American journal of ophthalmology.

[55]  Alan Hedge,et al.  Effects of an Ergonomic Intervention on Musculoskeletal Discomfort among Office Workers , 2001 .

[56]  Jennie P. Psihogios,et al.  The effects of video display terminal height on the operator: a comparison of the 15° and 40° recommendations , 1998 .

[57]  Benjamin C Amick,et al.  Effect of Office Ergonomics Intervention on Reducing Musculoskeletal Symptoms , 2003, Spine.

[58]  E Grandjean,et al.  VDT Workstation Design: Preferred Settings and Their Effects , 1983, Human factors.

[59]  K H Kroemer,et al.  Preferred line of sight angle. , 1986, Ergonomics.

[60]  John F. Fulton,et al.  Medical physiology and biophysics , 1960 .

[61]  W. M. Keyserling,et al.  Observational Analysis of the Hand and Wrist: A Pilot Study , 1991 .

[62]  S. L. Wright,et al.  Resolution and legibility: A comparison of TFT‐LCDs and CRTs , 1999 .

[63]  Chin-Chiuan Lin,et al.  Comparison of TFT-LCD and CRT on visual recognition and subjective preference , 2004 .

[64]  J. Sheedy Vision problems at video display terminals: a survey of optometrists. , 1992, Journal of the American Optometric Association.

[65]  L M Schleifer,et al.  Work Posture, Workstation Design, and Musculoskeletal Discomfort in a VDT Data Entry Task , 1991, Human factors.

[66]  Jane F. Koretz,et al.  The mechanism of presbyopia , 2005, Progress in Retinal and Eye Research.

[67]  H. C. Weston SIGHT LIGHT AND EFFICIENCY , 1950 .

[68]  S. P. Butzon,et al.  Prescribing for the moderate-to-advanced ametropic presbyopic VDT user. A comparison of the Technica Progressive and Datalite CRT trifocal. , 1997, Journal of the American Optometric Association.

[69]  Nathaniel Hupert,et al.  Upper extremity musculoskeletal symptoms and functional impairment associated with computer use among college students. , 2004, Work.

[70]  M. Campbell,et al.  Presbyopia and the optical changes in the human crystalline lens with age , 1998, Vision Research.

[71]  Carolyn M. Sommerich,et al.  Factors to Consider in Selecting Appropriate Computer Monitor Placement , 2000 .

[72]  K. Daum,et al.  Effects of residual astigmatism in contact lens wear on visual discomfort in VDT use. , 1991, Journal of the American Optometric Association.

[73]  T Wittig,et al.  Influence of screen and copy holder positions on head posture, muscle activity and user judgement. , 1998, Applied ergonomics.

[74]  Shrawan Kumar A computer desk for bifocal lens wearers, with special emphasis on selected telecommunication tasks , 1994 .

[75]  J. Sheedy,et al.  Visual effects of the luminance surrounding a computer display , 2005, Ergonomics.

[76]  D A Owens,et al.  Near work, visual fatigue, and variations of oculomotor tonus. , 1987, Investigative ophthalmology & visual science.

[77]  J. Buring,et al.  Prevalence of dry eye syndrome among US women. , 2003, American journal of ophthalmology.

[78]  Justin G. Hollands,et al.  LCD versus CRT Displays: A Comparison of Visual Search Performance for Colored Symbols , 2002, Hum. Factors.

[79]  Mark S. Sanders,et al.  Human factors in engineering and design, 7th ed. , 1993 .

[80]  Panayiotis Zaphiris,et al.  Effects of Information Layout on Reading Speed: Differences between Paper and Monitor Presentation , 2001 .

[81]  A. Spaepen,et al.  Posture, muscle activity and muscle fatigue in prolonged VDT work at different screen height settings , 2003, Ergonomics.

[82]  J P Psihogios,et al.  A field evaluation of monitor placement effects in VDT users. , 2001, Applied ergonomics.

[83]  Steven L. Sauter,et al.  Job and health implications of VDT use: initial results of the Wisconsin-NIOSH study , 1983, CACM.

[84]  Walter W. Wierwille,et al.  Effect of Glare on Performance of a VDT Reading-Comprehension Task , 1985, Human factors.

[85]  Allan Toomingas,et al.  Self-reported working conditions of VDU operators and associations with musculoskeletal symptoms : a cross-sectional study focussing on gender differences , 2002 .

[86]  Arne Aarås,et al.  Work with visual display units: Long-term health effects of high and downward line-of-sight in ordinary office environments , 2006 .

[87]  R. Weale,et al.  Epidemiology of refractive errors and presbyopia. , 2003, Survey of ophthalmology.

[88]  M. Campbell,et al.  Biometric, optical and physical changes in the isolated human crystalline lens with age in relation to presbyopia , 1999, Vision Research.

[89]  D Trusiewicz,et al.  [Eye-strain symptoms after work with a computer screen]. , 1995, Klinika oczna.

[90]  Owen M. Evans,et al.  Predictors of neck and shoulder pain in non-secretarial computer users , 2000 .

[91]  L. Straker,et al.  An evaluation of visual display unit placement by electromyography, posture, discomfort and preference , 2000 .

[92]  R A Henning,et al.  Frequent short rest breaks from computer work: effects on productivity and well-being at two field sites. , 1997, Ergonomics.

[93]  S M Dorman,et al.  Video display terminals: safe use guidelines. , 1998, The Journal of school health.

[94]  P. E. Goodwin Evaluation of Methodology for Evaluating Lighting for Offices with VDTs , 1987 .

[95]  T. Armstrong,et al.  Cross-sectional study of the relationship between repetitive work and the prevalence of upper limb musculoskeletal disorders. , 1999, American journal of industrial medicine.

[96]  K. Tsubota,et al.  Results of a population-based questionnaire on the symptoms and lifestyles associated with dry eye. , 1999, Cornea.

[97]  R. Scott,et al.  Computer terminal work and the benefit of microbreaks. , 2001, Applied ergonomics.

[98]  James E Sheedy,et al.  The optics of occupational progressive lenses. , 2005, Optometry.

[99]  Ankrum Associates Viewing Distance at Computer Workstations (Guidelines for monitor placement) , 1996 .

[100]  Daniel E. McCrobie,et al.  Effects of keyboard tray geometry on upper body posture and comfort. , 1999, Ergonomics.

[101]  S. West,et al.  Epidemiology of risk factors for age-related cataract. , 1995, Survey of ophthalmology.

[102]  S Hignett,et al.  Rapid entire body assessment (REBA). , 2000, Applied ergonomics.

[103]  Keir Fraser,et al.  The influence of computer monitor height on head and neck posture 1 Requests for reprints should be , 1999 .

[104]  F R Sánchez-Román,et al.  [Risk factors for asthenopia among computer terminal operators]. , 1996, Salud publica de Mexico.

[105]  J. Day,et al.  Computer and Internet Use in the United States: 2003 , 2005 .

[106]  Daniel Imbeau,et al.  Comparison of three computer office workstations offering forearm support: impact on upper limb posture and muscle activation , 2006, Ergonomics.

[107]  S Saito,et al.  Ergonomic aspects of portable personal computers with flat panel displays (PC-FPDs): evaluation of posture, muscle activities, discomfort and performance. , 1998, Industrial health.

[108]  A Hedge,et al.  Where are we in understanding the effects of where we are? , 2000, Ergonomics.

[109]  L Karlqvist,et al.  A process for the development, specification and evaluation of VDU work tables. , 1998, Applied ergonomics.

[110]  B. Knave,et al.  Eye discomfort and work with visual display terminals. , 1994 .

[111]  J P Bonde,et al.  Physical exposure assessment in monotonous repetitive work--the PRIM study. , 2001, Scandinavian journal of work, environment & health.

[112]  B. Silverstein,et al.  Quantifying repetitive hand activityfor epidemiological research on musculoskeletal disorders – part I: individual exposure assessment , 2006, Ergonomics.

[113]  Martina Ziefle,et al.  Aging, Visual Performance and Eyestrain in Different Screen Technologies , 2001 .

[114]  D. Rempel,et al.  VDT-related musculoskeletal symptoms: interactions between work posture and psychosocial work factors. , 1994, American journal of industrial medicine.

[115]  Jeanne Mager Stellman,et al.  Office Work Can Be Dangerous to Your Health , 1985 .

[116]  D. Kleinbaum,et al.  A prospective study of computer users: I. Study design and incidence of musculoskeletal symptoms and disorders. , 2002, American journal of industrial medicine.

[117]  Carolyn M. Sommerich,et al.  Effects of Computer Monitor Viewing Angle and Related Factors on Strain, Performance, and Preference Outcomes , 2001, Hum. Factors.

[118]  Paul Muter,et al.  Reading and skimming from computer screens and books: the paperless office revisited? , 1991 .

[119]  M G Helander,et al.  An overview of standards and guidelines for visual display terminals. , 1984, Applied ergonomics.

[120]  L. Forcier,et al.  Work related musculoskeletal disorders (WMSDs) : a reference book for prevention , 1995 .

[121]  K. Tsubota,et al.  Effects of ocular surface area and blink rate on tear dynamics. , 1995, Archives of ophthalmology.

[122]  Ravi Thomas,et al.  Amplitude of accommodation and its relation to refractive errors. , 2005, Indian journal of ophthalmology.

[123]  F. Aghazadeh,et al.  Influence of VDT monitor positions on discomfort and performance of users with or without bifocal lenses. , 1998, Journal of human ergology.

[124]  Pentti K. Seppälä,et al.  Experience of Stress, Musculoskeletal Discomfort, and Eyestrain in Computer-Based Office Work: A Study in Municipal Workplaces , 2001, Int. J. Hum. Comput. Interact..

[125]  M. C. Acosta,et al.  The influence of eye solutions on blinking and ocular comfort at rest and during work at video display terminals. , 1999, Experimental eye research.

[126]  T. Schlote,et al.  Characteristics of spontaneous eyeblink activity during video display terminal use in healthy volunteers , 2003, Graefe's Archive for Clinical and Experimental Ophthalmology.

[127]  A Wolska,et al.  Luminance of the surround and visual fatigue of VDT operators. , 1999, International journal of occupational safety and ergonomics : JOSE.

[128]  W M Keyserling,et al.  A checklist for evaluating ergonomic risk factors associated with upper extremity cumulative trauma disorders. , 1993, Ergonomics.

[129]  Jefferson M. Koonce,et al.  Comprehension and workload differences for VDT and paper-based reading , 2001 .